共查询到20条相似文献,搜索用时 140 毫秒
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跨栏跑训练分为身体训练和技术训练,身体是基础,技术是保证。没有好的技术素质再好也不行。仅就技术训练中容易被忽视的若干问题,如训练中要建立正确的技术概念,要明确跨栏跑技术训练的重点和难点,过栏技术、起跑过第一栏技术、过栏与栏间跑相结合技术和全程跨栏跑技术等技术训练中应注意的问题。谈一点自己的看法。 相似文献
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假定发展中国家同时进行自主创新和国外技术模仿,运用学习模型分析框架,探讨技术模仿、技术差距、自主创新对发展中国家技术进步的影响。理论分析表明,当发展中国家与发达国家的技术水平差距较大时,发展中国家主要采用技术模仿来缩小与发达国家间的差距。但随着技术差距不断缩小,发展中国家在技术引进的基础上,采用干中学向干中学加工的转换模式,形成自主创新体系。本文运用1990~2008年中美时间序列数据,实证检验了技术模仿、自主创新与技术进步间的关系。发现技术模仿和自主创新的加强是促进我国技术进步的重要变量,而技术差距对我国技术进步具有负面影响。 相似文献
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郑文芬 《中国高新技术企业评价》2014,(35):49-50
水处理技术分为物理处理技术与化学处理技术两种,在电厂中通常会采用化学水处理技术。化学水处理技术指的是采用化学药物转化水中的杂质或集中杂质后进行统一处理。文章分析了电厂化学水处理技术的应用情况,包括全膜分离技术、EDTA清洗废水处理技术,同时论述了电厂化学水处理技术的发展趋势。 相似文献
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欧阳昭 《中小企业管理与科技》2014,(13):313-313
数控机床是装备制造业的工作母机,其可靠性技术目前已成为制约行业发展的关键共性技术。本文主要对我国数控机床可靠性技术的研究进展进行综合评述,论述数控机床的可靠性建模技术、故障分析技术、可靠性设计技术和可靠性试验技术的研究历程和技术进展。 相似文献
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机电一体化技术是多学科交叉综合的一项技术,是机械技术与微电子技术、信息技术互相渗透的产物,随着科学技术迅速发展,机电一体化技术的应用也越来越广泛。现对机电一体化技术的应用进行阐述,并对其发展进行探究。 相似文献
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Patricia Werhane 《Employee Responsibilities and Rights Journal》1990,3(2):87-90
Workfare programs are state-instituted programs that require able-bodied persons with children of school age who wish to claim welfare payments to participate in job training programs, and, eventually, to enter the work force. The philosophy of workfare is based on the value of work and the goal of self-determination. However, as a mandatory program for welfare recipients, workfare requires of those recipients certain duties which, according to those who challenge workfare, interfere with the freedom to choose what one will do with one's life. Whether some form of workfare will be adopted as part of our national welfare system remains to be seen. What the debate about such a program suggests is that welfare, in itself, by ignoring the necessity of security and education for full human agency, neither satisfies basic needs nor prepares its recipients for any life other than that of dependency. With all its difficulties workfare nevertheless presents an alternative to welfare that, at least in theory, more closely identifies its purpose with the values of our society. 相似文献
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A bstract . "Structuralism" and "functionalism" facilitate an analysis of the evolution oi economic thought as a series of cultural, institutional , and socioeconomic challenges and responses. The methodologies of "structuralism" and "functionalism," like Hegelian dialectics, 1 to which they are closely related, do not consider thought systems or socioeconomic systems in terms of fixed and stable relationships but in the light of dynamic processes of change. They emphasize communication, feedback , and continuity. The aim of these methodologies is to facilitate the analyses of changes in interrelationships which constitute the processes of evolution. The economist is concerned with the theoretical analysis of socioeconomic processes. His task can be facilitated by describing and analyzing structural-functional relationships of the economy and its parts. However, the methodologies of structuralism and functionalism cannot be used to predict theoretical developments. At best they can be utilized to select from some set of possible alternatives. 相似文献
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Amulya Gurtu John D. Arendt 《International Journal of Nonprofit & Voluntary Sector Marketing》2020,25(3)
The objective of this paper is to present the impact of packaging material on sustainability. The article analyzes the size of the problem that arises from the use of packaging and the effect of various types of packaging material on waste management. The data on solid waste from the United States and the European Union reinforce that the problem is not only huge but also requires immediate attention. The research found that paying attention to packaging has the potential to improve economic, environmental, and social sustainability. Reducing packaging in supply chains improves profitability for organizations, reduces environmental impact, and helps societies in lowering the cost of disposal. The cost of packaging materials and the costs of disposal and landfill, are borne by the end consumers. Suggested approaches to minimizing the generation of packaging waste include concerted efforts for reducing packaging throughout supply chains where elimination of packaging is not feasible, the formation of a global policy on the use and disposal of packaging materials, and educating consumers. 相似文献
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This study is an investigation of the effect of profit-sharing on labor productivity. When monitoring labor performance is costly for management, a regular wage/salary contract is insufficient to induce profit-maximizing behavior from the worker. The authors demonstrate that when this profit-maximizing behavior can be induced only through profit-sharing, a linear profit-sharing program will increase productivity and the welfare of both management and labor. The benefit from profit-sharing is increasing up to the point where the utility of additional income is offset by the negative utility of extraordinary effort (working harder or providing higher quality work). The income effect, i.e., the change in negative utility of extraordinary effort given a change in income, can potentially either increase or decrease the point at which the income-effort tradeoff-reaches zero. 相似文献
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A bstract This paper provides a few historical notes on government involvement in health, followed by a summary of the theoretical arguments that economists offer in its support. Irving Fisher's views and recommendations about health are examined in the light of today's perceptions concerning health, health economics, and health policy. The wide variety of roles that the U.S. and other governments currently play in health is reviewed, and the ability of economics to explain these roles is assessed. The consequences of government involvement for the health of populations, for expenditures on health care, and for political and social stability are examined. The paper concludes with an overview of new worldwide trends in health policy and some probable explanations for these trends. 相似文献
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We investigate the issue of offshoring in a general-equilibrium model of two countries and one sector of increasing returns to scale. Our model uncovers that offshoring occurs and endogenously evolves in a bell-shaped pattern when trade costs decline, explaining some stylized facts in developed countries. Furthermore, this simple framework can be applied to examine the welfare issue. We find that a fall in offshoring costs benefits the high-wage country but hurts the low-wage country. On the other hand, the low-wage country benefits with trade liberalization. The impact of falling trade costs on the welfare of the high-wage country depends on the values of offshoring freeness. 相似文献
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Akihiko Yanase 《Journal of Economic Dynamics and Control》2011,35(10):1789-1799
This paper examines an equilibrium growth model in which production activities generate environmental pollution that has a negative welfare effect and in which individual households' subjective discount rate is a function of individual consumption, which is internal to each household, and of total pollution, which is an external factor to the individual agents. It is shown that there may exist multiple steady states and that the dynamic equilibrium may display indeterminacy, depending on the properties of the discount-rate function, the pollution-capital relationship in production technology, and the pollution-consumption relationship in instantaneous utility. The long-run effects of tighter environmental policy are subsequently examined, and the results are also found to be dependent on the above factors. 相似文献
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Klaus Krippendorff 《Quality and Quantity》1987,21(2):109-123
The paper attempts to make a clear distinction between three broad families of statistical indices: association, agreement, and what one may call equity. The need for this distinction arises in social research, for example, where reliability (accuracy, reproducibility, and stability) is assessed by measures of association rather than agreement. In this application, the assumptions built into an association measure conflict with the reality that gives rise to reliability data. A second motivation for this distinction is that association measures tend to express chance as the product of two potentially very different frequency distributions, agreement as the product of two identical distributions, and equity ignores such distributions altogether. A third motivation for this distinction is that the probability distribution of such measures does not depend on whether they are linear or non-linear, symmetrical or asymmetrical, or whether they express predictability or the extremality of a frequency distribution, but on their family membership. Notions of association, agreement, and equity have inherently nothing to do with the (nominal, ordinal, interval, and ratio) ordering in data. The 2-by-2 case is therefore chosen as the basis of the proposed distinction. All statistical indices, whether they are designed to characterise multivariate data or to identify complex orderings, ought to be applicable to this most reduced case of two variables, making one distinction in each. To test a coefficient's membership in one of the three families, nothing more complex is needed. 相似文献
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《The North American Journal of Economics and Finance》2006,17(1):79-101
This paper assesses the implications of U.S. budget and current account deficits for financial and economic stability. The primary focus is on the behavior of interest rates in response to deficits, then effects on the economy through the financial system. The paper argues, and shows with empirical evidence, including from a large-scale econometric model, that expected, but not realized, budget deficits affect interest rates. Under certain circumstances, particularly near full employment, sustained budget and current account deficits can lead to financial disarray and a severely constrained economy. 相似文献
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John M. Barron Mark A. Loewenstein Dan A. Black 《Journal of Economic Dynamics and Control》1984,8(3):265-275
The paper analyzes the employment policy of a firm that can vary both hours and the level of employment. The analysis differs from previous work in the adjustment cost literature in that the firm is able to change its employment not only through hires, layoffs, and quits, but also by recalls of employees who were previously laid off. Thus, we introduce the possibility of the firm inventorying the labor input. It is shown that this labor inventory potential is necessary if the firm is to ever lay off workers. Further, it is demonstrated that linear rather than strictly convex adjustment costs are then required if the firm is to always recall employees who were previously laid off prior to hiring new workers. 相似文献